#428D18
Closest named color: Forest Green (#228B22). oklch(57.3% 0.164 137.3), rgb(66, 141, 24).
Aa
Black text reads best on this color (5.05:1).
About this color
#428D18 is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.164 and its hue 137°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest Green (#228B22), ΔE 0.023 away. Black text reads best on it, at 5.05:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #428D18 |
| RGB | rgb(66, 141, 24) |
| HSL | hsl(98, 71%, 32%) |
| OKLCH | oklch(57.3% 0.164 137.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #428D18 | 4.15:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #428D18 | 5.05:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #428D18 text on white | 4.15:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #428D18 text on black | 5.05:1 | AA | Lc -33.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E3EDE0
oklch(93.5% 0.02 138.4)
-
Step 200
200
#CDE0C6
oklch(88.5% 0.041 137.2)
-
Step 300
300
#AACC9E
oklch(80.8% 0.073 137.6)
-
Step 400
400
#7CB267
oklch(70.8% 0.119 137.4)
-
Step 500
500
#599E3B
oklch(63.2% 0.151 137.5)
-
Step 600
600 (this color)
#428D18
oklch(57.3% 0.164 137.3)
-
Step 700
700
#2F7300
oklch(49.2% 0.15 137.5)
-
Step 800
800
#285E06
oklch(42.8% 0.126 137.2)
-
Step 900
900
#254D12
oklch(37.7% 0.098 137.4)
-
Step 950
950
#162D0D
oklch(26.9% 0.062 137.8)
#428D18 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #928000 | 0.104 |
| Deuteranopia (no green cones) | #887A26 | 0.103 |
| Tritanopia (no blue cones) | #3D8878 | 0.115 |
| Achromatopsia (no color) | #7C7C7C | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428D18
#428D18
oklch(57.3% 0.164 137.3)
- #9E53B6
#9E53B6
oklch(57.2% 0.164 317.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #428D18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.023
- Sap Green #5C8B15 ΔE 0.026
- Emerald Green #028F1E ΔE 0.028
- Kelley Green #009337 ΔE 0.031
- Irish Green #019529 ΔE 0.031
- True Green #089404 ΔE 0.035
- Mossy Green #638B27 ΔE 0.039
- Dark Grass Green #388004 ΔE 0.041
Use #428D18 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.